UndrainableNodeBehavior Class

Package:: com.azure.resourcemanager.containerservice.models

Maven Artifact:: com.azure.resourcemanager:azure-resourcemanager-containerservice:2.58.0

java.lang.Object
- com.azure.core.util.ExpandableStringEnum<T>
- - com.azure.resourcemanager.containerservice.models.UndrainableNodeBehavior

public final class UndrainableNodeBehavior
extends ExpandableStringEnum<UndrainableNodeBehavior>

Defines the behavior for undrainable nodes during upgrade. The most common cause of undrainable nodes is Pod Disruption Budgets (PDBs), but other issues, such as pod termination grace period is exceeding the remaining per-node drain timeout or pod is still being in a running state, can also cause undrainable nodes.

Field Summary

Modifier and Type	Field and Description
static final UndrainableNodeBehavior	CORDON AKS will cordon the blocked nodes and replace them with surge nodes during upgrade.
static final UndrainableNodeBehavior	SCHEDULE AKS will mark the blocked nodes schedulable, but the blocked nodes are not upgraded.

Constructor Summary

Constructor	Description
UndrainableNodeBehavior()	Deprecated Use the fromString(String name) factory method. Creates a new instance of UndrainableNodeBehavior value.

Constructor

Description

UndrainableNodeBehavior()

Deprecated

Use the fromString(String name) factory method.

Creates a new instance of UndrainableNodeBehavior value.

Method Summary

Modifier and Type	Method and Description
static UndrainableNodeBehavior	fromString(String name) Creates or finds a UndrainableNodeBehavior from its string representation.
static Collection<UndrainableNodeBehavior>	values() Gets known UndrainableNodeBehavior values.

Methods inherited from ExpandableStringEnum

<T>fromString <T>values equals getValue hashCode toString

Methods inherited from java.lang.Object

clone finalize getClass notify notifyAll wait wait wait

Field Details

CORDON

public static final UndrainableNodeBehavior CORDON

AKS will cordon the blocked nodes and replace them with surge nodes during upgrade. The blocked nodes will be cordoned and replaced by surge nodes. The blocked nodes will have label 'kubernetes.azure.com/upgrade-status:Quarantined'. A surge node will be retained for each blocked node. A best-effort attempt will be made to delete all other surge nodes. If there are enough surge nodes to replace blocked nodes, then the upgrade operation and the managed cluster will be in failed state. Otherwise, the upgrade operation and the managed cluster will be in canceled state.

SCHEDULE

public static final UndrainableNodeBehavior SCHEDULE

AKS will mark the blocked nodes schedulable, but the blocked nodes are not upgraded. A best-effort attempt will be made to delete all surge nodes. The upgrade operation and the managed cluster will be in failed state if there are any blocked nodes.

Constructor Details